Bromocyclopentane
Cyclopentyl bromide
CAS: 137-43-9
Molecular Formula: C5H9Br
Bromocyclopentane - Names and Identifiers
| Name | Cyclopentyl bromide |
| Synonyms | Bromocyclopentane 1-Bromocyclopentane Cyclopentyl bromide Cyclopentane Bromide 1-BROMOPENTAMETHYLENE BROMOCYCLOPENTANE, STAB. Bromocyclopentane,Cyclopentyl bromide |
| CAS | 137-43-9 |
| EINECS | 205-294-6 |
| InChI | InChI=1/C5H9Br/c6-5-3-1-2-4-5/h5H,1-4H2 |
| InChIKey | BRTFVKHPEHKBQF-UHFFFAOYSA-N |
Bromocyclopentane - Physico-chemical Properties
| Molecular Formula | C5H9Br |
| Molar Mass | 149.03 |
| Density | 1.39 g/mL at 25 °C (lit.) |
| Boling Point | 137-139 °C (lit.) |
| Flash Point | 95°F |
| Water Solubility | Immiscible with water. |
| Vapor Presure | 9.73mmHg at 25°C |
| Appearance | Liquid |
| Specific Gravity | 1.39 |
| Color | Clear yellow to light brown |
| BRN | 1209256 |
| Storage Condition | Store at R.T. |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents, strong bases. |
| Refractive Index | n20/D 1.4881(lit.) |
| Physical and Chemical Properties | Character: colorless liquid. With a similar aroma of camphor. After long-standing, it turned brown. boiling point 137~139 ℃ relative density 1.3860 refractive index 1.4885 flash point 35 ℃ solubility: soluble in ethanol, ether, insoluble in water |
| Use | Used as an intermediate in organic synthesis, for the production of drug cyclopentylthiazide |
Bromocyclopentane - Risk and Safety
| Risk Codes | 10 - Flammable |
| Safety Description | S23 - Do not breathe vapour. S24/25 - Avoid contact with skin and eyes. S16 - Keep away from sources of ignition. |
| UN IDs | UN 1993 3/PG 3 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 8 |
| TSCA | Yes |
| HS Code | 29035990 |
| Hazard Class | 3 |
| Packing Group | III |
Bromocyclopentane - Upstream Downstream Industry
| Raw Materials | Cyclopentanone |
| Downstream Products | Quinestrol |
Bromocyclopentane - Nature
Open Data Verified Data
colorless liquid. The relative density was 1. 3860. Boiling Point 137~139 deg C. Flash point 35 °c. Refractive index 4885. Soluble in ethanol, ether, insoluble in water. With a similar aroma of camphor. After long-standing, it turned brown.
Last Update：2024-01-02 23:10:35
Bromocyclopentane - Preparation Method
Open Data Verified Data
with cyclopentanol as raw material, mixed with hydrobromic acid, heated and refluxed, after steam distillation and stratification, the oil layer was washed with 5% sodium carbonate solution, dried, filtered and fractionated, fractions of 136-139 °c were collected.
Last Update：2022-01-01 10:38:19
Bromocyclopentane - Use
Open Data Verified Data
an intermediate used in the synthesis of organic substances such as pharmaceuticals (cyclopentylthiazide).
Last Update：2022-01-01 10:38:19
Bromocyclopentane - Safety
Open Data Verified Data
- when the concentration is high, it damages the liver and has anesthetic effect. See 1-bromoisopentane (A057). The production site should be well ventilated and the equipment should be closed. Protective gear was worn by the operator.
- This product is packaged in an iron drum or an iron drum lined with a plastic drum. Store in a cool, ventilated place. Sun protection, heat protection, away from fire. According to the general provisions of the storage and transportation of chemicals.
Last Update：2022-01-01 10:38:20
Bromocyclopentane - Reference Information
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | bromocyclopentane is an important intermediate in organic synthesis, which can be used as synthetic raw materials for a variety of medicines and agricultural chemicals. The halogenated cyclopentane can be obtained by reacting the corresponding alcohol with a thionyl halide, a phosphorus trihalide or a hydrohalic acid, or by an addition reaction of a hydrohalic acid with an olefin. |
| Use | used as an intermediate in organic synthesis, used in the production of drug cyclopentylthiazide organic synthesis intermediate. It is used for the production of cyclopentylthiazide in medicine. synthesis of pharmaceutical and pesticide intermediates |
| production method | obtained by bromination of cyclopentanol: cyclopentanol and hydrobromic acid were mixed and heated to about 170 ° C. And refluxed for 6-8 hours. The oil layer was then distilled by steam water, washed with 5% sodium carbonate, dried, filtered and fractionated, and the 136-139 °c fraction was collected as the finished product. Another method is the reaction of cyclopentanol with phosphorus tribromide: cyclopentanol is cooled to 0 ° C., the new distilled phosphorus tribromide is added dropwise, added at 0-5 ° C., stirred for 2H, and left overnight at room temperature. After adding water, the layers are separated, and the oil layer is subjected to steam distillation. The distillate was separated into layers, and the oil layer was washed with 10% sodium bicarbonate solution, dried with anhydrous calcium chloride, filtered, and the filtrate was distilled to collect a 134-141 ° C. Fraction to obtain bromocyclopentane. |
Last Update：2024-04-09 19:05:07
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Raw Materials for Bromocyclopentane
Downstream Products for Bromocyclopentane